The group's mailing lists are ic-linux-list@imperial.ac.uk and ic-linux-discuss@imperial.ac.uk.
You can subscribe to either list by visiting the appropriate URL:
http://mailman.ic.ac.uk/mailman/listinfo/ic-linux-list – this is for announcements of meetings, only the committee can post to this list
http://mailman.ic.ac.uk/mailman/listinfo/ic-linux-discuss – this is for general linux discussion
This is the groups main facility, join it.
Archives of mailing list posts are available on the Mailman pages (see above).